[Bug 70874] New: oopses in i915_gem_free_request()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70874

          Priority: medium
            Bug ID: 70874
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: oopses in i915_gem_free_request()
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: eric at anholt.net
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 88124
  --> https://bugs.freedesktop.org/attachment.cgi?id=88124&action=edit
oops output from dmesg

Ever since switching to drm-intel-nightly to test some patches a while back, my
IVB MBA has been oopsing on a regular basis when running piglit quick.tests in
a gnome-shell session.

Oops will be attached, but an excerpt:

[111184.767285] RIP: 0010:[<ffffffffa0014c30>]  [<ffffffffa0014c30>]
i915_gem_free_request+0x50/0xc0 [i915]
...
[111184.767616] Call Trace:
[111184.767639]  [<ffffffffa0015e75>] i915_gem_retire_requests_ring+0x65/0x130
[i915]
[111184.767681]  [<ffffffffa001c5b7>] i915_gem_set_domain_ioctl+0x197/0x250
[i915]
[111184.767718]  [<ffffffff8151da82>] drm_ioctl+0x502/0x630
[111184.767746]  [<ffffffff811c67a1>] ? fsnotify+0x231/0x310
[111184.767774]  [<ffffffff8119b8fd>] do_vfs_ioctl+0x2cd/0x4a0
[111184.767801]  [<ffffffff8119bb51>] SyS_ioctl+0x81/0xa0
[111184.767829]  [<ffffffff81c36ea2>] system_call_fastpath+0x16/0x1b

Apparently at some point my kernel config rotted and lost debugging symbols;
I've found the knob to reenable and built a new one so next time I'll be able
to get line info.

Kernel commit:
commit 5877608517a5b964433d9e6bba402426ccdc1a41
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Mon Oct 14 11:38:40 2013 -0700

    use per-context OACONTROL stuff again.

branchpoint from danvet:
commit aabd627ec77463dc9c064ce2735ef71f48a2ec94
Merge: e4e0241 14c8d11
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Tue Oct 22 00:28:42 2013 +0200

    Merge remote-tracking branch 'drm-upstream/drm-next' into drm-intel-nightly

Note that I was also experiencing this problem without kwg's stuff -- it
started when I was trying to get a patch tested for Ben.

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